Reversing-valve for regenerative or similar furnaces.



No. 707,572. Patented Aug. 26, I902. A. FISCHER.

REVERSING VALVE FOR REGENERATIVE 0R SIMILAR FURNACES.

(Application filed Aug. 8, 1901. (No Modzal. 2 Sheets-Sheet I.

No. 707,572. Patented Aug. 26, I902.

A. FISCHER.

REVERSING VALVE FOR REGENERATIVE DR- SIMILAR FURNACES.

Application filed Aug. 8, 1901.)

2 Sheets-Sheet 2.

No Model.)

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UNrrn Srnrrns ATENT OFFICE.

ALBERT FISCHER, OF OBERHAUSEN, GERMANY.

REVERSING-VALVE FOR REGENERATIVE OR SIMILAR FURNACES.

SPECIFICATION forming part of Letters Patent No. 707,572, dated August 26, 1902.

Application filed August 8, 1901. Serial No. 71,370. (No model.)

To (LZZ whom it may con/007 11,.-

Be it known that I, ALBERT FISCHER, a subject of the Emperor of Germany, residing at ll/Iuelheimerstrasse 87 to 89, Oberhausen, Rhineland, Germany, have invented certain new and useful Improvements in Reversing- Valves for Regenerative or Similar Gas-Fnrnaces; and I do hereby declare the following to be a full, clear, and exact description of the invention, such as will enable others skilled in the art to which it appertains to make and use the same. I

The gas-valves of regenerative, Siemens, Martin, welding, melting, and similar furnaces, which are provided with a diagonallyarranged valve-disk, each time the inlet and outlet side is changed let fresh gas pass through and escape into the chimney-stack and further necessitate the arrangement of special valves for regulating the quantity of gas flowing to and from the furnace. The gas-valve according to this invention obviates all waste when reversing the valve and enables the passage of the gas to be simultaneously regulated or entirely stopped up.

In the accompanying drawings, Figures 1 and 2 are sectional elevations of a reversingvalve constructed according to this invention, showing the valve in two positions. Figs. 3 and 4 are a sectional elevation and a sectional plan, respectively, of another modified construction of valve; and Figs. 5 and 6 are similar views showing a further modification.

In the construction shown in Figs. 1 and 2 the gas-valve consists of two concentric cylinders a b, fitting closely together, open at both ends and provided with two openings 0 and d, situated opposite one another. The inner cylinder h is divided into two parts by the partition 9, which is inclined diagonally. To this partition 6 the rod f for reversing, or, rather, for turning, the cylinder 1) may be suitably attached. In order that this turning movement may be more easily performed, the upper flange of the cylinder 1) runs on a ring of balls h in a ball-race provided in the upper flange t' of the outer cylindera. In order that the supply-gas and exhaust-gas may not mix with one another through the interstices between the cylinders a and b the upper and lower edges of the inner cylinder Z1 run in annular sand seals 7.; provided in the flanges of the outer cylinder (1. To change the inlet and outlet side, the cylinder 1) is turned through one hundred and eighty degrees. There is absolutely no connection between the two sides for a single instant during this turning motion, so that any loss of gas is a matter of impossibility. By gradually turning the inner cylinder the openings 0 c in the outer cylinder a maybe reduced asrequired for the purpose of regulatingor may be entirely closed.

Figs. 3 and 4 illustrate a further modification of gas-valve. In this case the valvecheeks consist of two parts m m, made of lireclay. The outer faces of these latter are flat and incased in four cast-iron plates 1) p q q, which are so fastened together that when the inner cylindrical faces of the parts m, m, which are spaced apart, wear away by the turning of the cylinder 1) the wear may be compensated for. For this purpose screwbolts 7' are secured at the outer edges of the narrower plates pp and project through eyes provided on the broader plates q q, and nuts 8 are screwed on the bolts outside the eyes. By screwing up these nuts 3 the fire-clay bodies m on may be followed upthat is to say, may be pressed up to the cylinder 1) to form a good joint. The plates p p are provided with corresponding openings 6. In this form of valve the upper sand seal 70 is rendered superfluous. The halls it run in a castiron race-ring a, which rests'freely on the fire-clay bodies m. These latter stand on a ring-shaped cast-iron foundation-plate o with the sand seal 70.

A further modification is shown in Figs. 5 and 6. In this construction the ends to of the gas-conduit butt up direct to the openings d in the cylinder 1) and are kept pressed up against the outer surface of this latter by means of spiral springs to. These springs are secured at each end to arms y, provided on the conduit-noses w. The outer cylinder is formed of sections .2, which are removably attached, by means of screws Z, to the noses w and slightly spaced from the inner cylinder Z2. At the top and bottom, however, the section-plates e are bent in to fit up closely to the cylinder 19. The plates a are divided at 2, so as to slide over one another. To further insure a good joint sand seals 3 may be fixed over the cylinder-openings cl onto the noses to. Here also the cylinder 1) runs in a sand seal 70, provided in the foundation-plate o. At the top it runs on balls h, whose race is secured on the top of the gas-chamber 4, into which the gas-inlet mouths at 5. This gas-chamber is fastened down onto a fixed cast-iron plate 6, with a downwardly-projecting flange which projects into the sand-seal groove in the top, flange of the inner cylinder b. As the cylinder I) under the influence of changing temperature expands or contracts,

the noses w and divided plate-sections 2 can follow the movement thus caused, the springs w assuring a good joint between to and z and (1, so that no gas is lost when the cylinder 1) is turned. The butt-noses w are connected to the inlet and outlet conduits (not shown on the drawings) to slide.

What I claim, and desire to secure by Letters Patent, is-

1. A reversing-valve for regenerative and similar furnaces characterized by two cylinders d 1) arranged one to turn inside the other open at both ends and provided with openings 0 d opposite one another to and from the furnace, the inner I) of which cylinders being divided into two parts by an inclined partition e, circular sand packings on the outer cylinder and lips on the inner cylinder working in the said sand packings.

2. A reversing-valve for regenerative and similar furnaces,comprising a cylinder 1) with a diagonal partition, valve-cheeks m partly surrounding the cylinder and made in two separate parts of fire-clay,and incasing plates ,1) q holding the cheeks together in such a manner that they can be adjusted and pressed up against the cylinder 1) to form a good joint.

3. A reversing-valve for regenerative and similar furnaces, comprising an inner cylinder with openings and a diagonal partition, and an outer cylinder made of two divided plates 2 which are provided at the top and bottom with bent-in flanges and with sliding noses w, in front of the openings din the inner cylinder 1), for the inlet and outlet conduits, springs 05 tending to draw the two parts of the outer cylinder together.

In testimony whereof I have affixed my signature in presence of two witnesses.

ALBERT FISCHER.

Witnesses:

J oI-IANN RENIERTZ, WM. ESSENWEIN. 

